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lodash
Advanced tools
A utility library delivering consistency, customization, performance, and extras.
Weekly downloads
Package description
Lodash is a JavaScript library that provides utility functions for common programming tasks using a functional programming paradigm. It includes functions for manipulating and traversing arrays, objects, and strings, as well as utilities for functions, language, math, number, object, sequence, and utility methods.
Array Manipulation
Lodash provides a rich set of array manipulation functions such as map, filter, find, and sort. The code sample demonstrates sorting an array in ascending order using a custom comparator.
[3, 2, 1].sort(_.compareWith(function(a, b) { return a - b; }))
Object Manipulation
Lodash allows for easy manipulation and traversal of objects. The code sample shows how to assign properties from source objects to a destination object.
_.assign({ 'a': 1 }, { 'b': 2 }, { 'c': 3 })
String Manipulation
Lodash includes functions to manipulate strings, such as converting to different cases, trimming, padding, etc. The code sample demonstrates converting a string to kebab-case.
_.kebabCase('Foo Bar')
Function Utilities
Lodash provides function utilities like debounce and throttle to control function invocation. The code sample shows a debounced function that will only be invoked after 250 milliseconds have passed without it being called again.
_.debounce(function() { console.log('Debounced'); }, 250)
Language Utilities
Lodash includes utilities for deep cloning, merging, and comparing objects. The code sample demonstrates deep cloning an object to ensure nested objects are cloned as well.
_.cloneDeep({ 'a': 1, 'b': { 'c': 2 } })
Underscore is a utility library with similar functionality to Lodash, offering a range of functions for manipulating arrays, objects, and functions. It is generally considered to be the predecessor to Lodash, which provides a superset of Underscore's features with additional performance optimizations.
Ramda is a functional programming library that emphasizes a more functional and composable approach compared to Lodash. It provides similar utilities but focuses on immutability and side-effect free functions, which can lead to a different programming style.
Immutable.js offers a different take on data manipulation by providing persistent immutable data structures. Unlike Lodash, which works with standard JavaScript objects and arrays, Immutable.js uses its own data structures, which can lead to better performance and easier reasoning about state changes in certain applications.
Readme
A utility library delivering consistency, customization, performance, & extras.
We’ve got API docs, benchmarks, and unit tests.
Create your own benchmarks at jsPerf, or search for existing ones.
For a list of upcoming features, check out our roadmap.
For more information check out these screencasts over Lo-Dash:
fromIndex
argumentObject
constructorthis
bindingcallback
and thisArg
argumentsLo-Dash has been tested in at least Chrome 523, Firefox 116, IE 6-10, Opera 9.25-12, Safari 3-6, Node.js 0.4.8-0.8.14, Narwhal 0.3.2, RingoJS 0.8, and Rhino 1.7RC5.
In browsers:
<script src="lodash.js"></script>
Using npm
:
npm install lodash
npm install -g lodash
npm link lodash
To avoid potential issues, update npm
before installing Lo-Dash:
npm install npm -g
In Node.js and RingoJS v0.8.0+:
var _ = require('lodash');
Note: If Lo-Dash is installed globally, run npm link lodash
in your project’s root directory before requiring it.
In RingoJS v0.7.0-:
var _ = require('lodash')._;
In Rhino:
load('lodash.js');
In an AMD loader like RequireJS:
require({
'paths': {
'underscore': 'path/to/lodash'
}
},
['underscore'], function(_) {
console.log(_.VERSION);
});
length
property [#799, test]_.isEmpty
should support jQuery/MooTools DOM query collections [#690, test]_.isObject
should avoid V8 bug #2291 [#605, test]_.keys
should work with arguments
objects cross-browser [#396, test]_.range
should coerce arguments to numbers [#634, #683, test]_.defaults
and _.extend
with ES6 Object.assign_.lateBind
to _.bindKey
_.assign
underscore
build of _.find
returns the first, not last, matched value_defaults
, _.extends
, and _.merge
works with _.reduce
npm
package installation work with more system configurations_.extend
an alias of _.assign
_.contains
, _.defaults
, _.extend
, and _.filter
_.where
to iterate only own properties of the source
objectbackbone
build Lo-Dash method dependenciesThe full changelog is available here.
Lo-Dash is part of the BestieJS “Best in Class” module collection. This means we promote solid browser/environment support, ES5 precedents, unit testing, and plenty of documentation.
John-David Dalton |
Blaine Bublitz | Kit Cambridge | Mathias Bynens |
FAQs
Lodash modular utilities.
The npm package lodash receives a total of 39,173,216 weekly downloads. As such, lodash popularity was classified as popular.
We found that lodash demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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